Base for a stool



FIG. 1 is a top plan view of a base for a stool, showing my new design;

FIG. 2 is a rear elevational view;

FIG. 3 is a bottom plan view;

FIG. 4 is a front elevational view;

FIG. 5 is a side elevational view, the opposite side being identical thereto; and,

FIG. 6 is a perspective view thereof. 

The ornamental design for a base for a stool, as shown and described. 